MUTATIONS. Mutant An organism expressing a mutated gene.

Slides:

Advertisements

Similar presentations

Advertisements

Mutations. What Are Mutations? Changes in the nucleotide sequence of DNA May occur in somatic cells (aren’t passed to offspring) May occur in gametes.

Mutations. What Are Mutations? Changes in the nucleotide sequence of DNA May occur in somatic cells (aren’t passed to offspring, only to descendant cells)

Including Mutations & Non-disjunction

Genetic Change DOT Point Distinguish between mutations of chromosomes distinguisg.

DNA Mutations. What Are Mutations? Changes in the nucleotide sequence of DNA.

12.4 MUTATIONS I. Kinds of Mutations

Genes and mutations. What are genes? A molecular unit of heredity The name for stretches of DNA and RNA that code for a specific protein (which has a.

8.7 – Mutations. Key Concept  Mutations are changes in DNA that may or may not affect phenotype. mutated base.

12-4 Mutations Mutation: A Change in DNA Mutation – any change in the DNA sequence that can also change the protein it codes for Mutations in Reproductive.

Mutations. Change / alteration to the DNA of an organism They may be good, bad or have no effect A plant that can better tolerate the cold (GOOD) A change.

Mutations. What Are Mutations? Changes in the nucleotide sequence of DNA May occur in somatic cells (aren’t passed to offspring) May occur in gametes.

Chapter 11.3 Genetic Changes.

Genetic Changes 11.3.

Definition : Any change in the nucleotide sequence of DNA.

Mutations. What Are Mutations?  A change in the structure or amount of an organisms genetic material  This mutation can be a tiny change in DNA structure.

DNA Mutations. What Are Mutations? Changes in the nucleotide sequence of DNA.

In your journal take down 5 facts while watching the video.

Mutations Any change in DNA sequence which is not immediately and properly repaired. If they occur in somatic cells then they are non-inheritable, if in.

Section 11.3 Genetic Changes.

1 NOTES: MUTATIONS 2 MUTATIONS: MUTATIONS = changes in the DNA sequence that affect genetic information.

MUTATIONS “THE TRUTH IS OUT THERE.”. “What’s in a gamete?” A gamete is a cell that fuses with another cell in SEXUAL REPRODUCTION. This means that the.

Sometimes replication, transcription and translation don’t go as planned! Replication, Transcription, and Translation errors result in mutations. A mutation.

Chromosomes, Genes, and Mutations

Mutations. Mutation effects Reproductive Cells -mutation in DNA sequence of an egg or sperm cell -mutation is passed on to offspring - possible effects.

Mutations, Test Crosses, Pedigrees Unit 6: Genetic Abnormalities IN 139.

8.7 Mutations KEY CONCEPT Mutations are changes in DNA that may or may not affect phenotype.

MUTATIONS  Several things can go wrong when DNA replicates.  Mutations.

MUTATIONS *Mutations are mistakes made in DNA. *Mutations can be caused by either naturally occurring, random events, or by factors in the environment.

Chromosomes/DNA Mutations. Chromosome Mutation Mutations are permanent gene or chromosome changes that will be passed on to offspring if they occur in.

12.4 Mutations.  What is a mutation and where can it occur? Inheritable change in genetic code 99.9 % are harmful, only 0.1% are helpful  Any change.

Mut a tions.  Cells do rarely make mistakes copying their own DNA resulting in a change in the DNA.  Mutation – a change in genetic material (DNA).

Karyotypes Different organisms have different numbers of chromosomes Autosomes: Any chromosome that is not a sex chromosome (X or Y chromosome) – Humans.

Section 11.3: Genetic Changes

Warm Up for 12/1/15 You get ____ chromosomes from your mom and ___ chromosomes from your dad to give you a total of ____ chromosomes. Autosomes include.

A change in the DNA sequence that affects genetic information

Mermaid Syndrome Video.

Karyotype A photo of the chromosomes in a dividing cell that show the chromosomes arranged by size. Purpose of a Karyotype: (1) to detect abnormalities.

Genetic Mutations.

DNA Mutations & Disorders

Genetic Mutations.

Types of mutations Mutations are changes in the genetic material

A change in the DNA sequence that affects genetic information

Mutations LN #23 Ms. Garcia California Content Standard Genetics

Chromosomes & Karyotypes

Chromosome Mutations and Chromosome Disorders

Cell Divisions & Mutations

SB2. The learner will analyze how biological traits are passed on to successive generations. d. Describe the relationships between changes in DNA and potential.

Mutations A mutation is any change in the DNA sequence.

Mutations A mutation is any change in the DNA sequence.

Genetic Mutations.

Karyotype A photo of the chromosomes in a dividing cell that show the chromosomes arranged by size. Purpose of a Karyotype: (1) to detect abnormalities.

Mutations chapters 8 and 12

Chromosomal Mutations

Presentation transcript:

MUTATIONS

Mutant An organism expressing a mutated gene

Types of mutations Point mutations (gene mutations) change in a single DNA base pair. Frameshift mutation single base added and deleted from DNA Chromosomal mutations changes in chromosomes. Insertion, deletion, inversion and translocation.

Mutation A sudden genetic change

Gene mutations

Point mutations Most common Most mutations are recessive and do not show. Some result in abnormalities that show eg Albino (shows in animals but lethal in plants Some are lethal mutations and result in death.

Chromosome mutations

Usually more drastic because more genes are involved. Occur during mitosis and meiosis, chromosomes break and rejoin incorrectly. Usually lethal, therefore, not passed on to future generations. Common in plants (polyploidism) 3n, 4n, 6n, not harmful and results in bigger, better fruits.

Nondisjunction Occurs when homologous chromosomes fail to separate correctly during meiosis. Examples: a. Trisomy – extra chromosome, Down’s syndrome extra 21 st chromosome b. Triploidy – extra set of chromosomes 3n c. Monosomy – missing one chromosome, Turner’s syndrome one missing X chromosome

Somatic mutations Mutations in the body cells Not passed on to the children because they only occur in body cells.

Germ mutations Mutations in the germ cells (reproductive cells – gametes – eggs and sperm. Passed on to the offspring.

Causes of mutations Mutagenic agents are called mutagens. Mutagens disrupt normal cellular activity. Mutagens: radiation x-rays UV light Smog, smoke, industrial chemicals, air pollutants. Viruses